Raker sharpening gauge



March so, 1948.

J. c. STONE 2,438,687

BAKER SHARPEN I NG GAUGE Filed May 24, 1946 I f2? 27 l I I I 9 26' i Patented Mar. 30, 1948 a ate;

UNITED STATES" PATENT OFFICE This invention relates to a raker sharpening gauge for use when sharpening narrow saws of the type known as Swedish buck saws and it is one object of the invention to provide a gauge by use of which teeth of a saw may be accurately.

filed and swaged.

Another object of the invention is to provide a gauge so formed that it may be very easily adjusted to dispose a file, and saw blade in proper angular relation to each other.

Another object of the invention is to provide the device with a swage so located that the teeth of a saw may be accurately bent when settin the teeth of the saw.

Another object of the invention is to provide a gauge with a guide plate carried by a support so formed and mounted that it may be very easily adjusted and accurately set by a workman having little experience in filing saws.

The invention is illustrated in the accompanying drawings wherein:

Fig. 1 is a side elevation of the improved gauge.

Fig. 2 is a top plan view of the device.

Fig. 3 is a sectional view upon an enlarged scale taken transversely through the gauge along line 3-3 of Figure 1. a

Fig. 4 is an end view of the gauge.

This improved gauge has a main frame I formed with a side wall 2 from the lower edge of which projects a base flange 3. Lugs 4 projectlaterally from the upper edge of the side wall over the base flange 3 and upon these lugs or tongues rest front and rear cap plates 5 and 6 which are firmly secured by screws 1. Midway its length the side wall is formed with an elongated recess 8 and under this recess the wall is formed with an opening 9 located close to the lower edge of the wall. Tongues l project horizontally from the wall 2 over openings II and at the upper edge of the opening 9 is a tongue I2 formed with an opening [3 aligned with an opening M formed through the flange midway the length thereof. Abutment tongues l extend downwardly from the cap plates in spaced relation to their inner ends.

A bridging bar or block l6 extends longitudinally of the frame I within the length of the recess 8 and this bar has upstanding arms 11 at its ends from which project feet l8 carrying upstanding pins l9 which pass through openings formed in the inner end portions of the cap plates 5 and 6. A shank 20 extends downwardly midway the length of the block or bridge bar It and through this shank and the mid-portion oi. the block is formed a threaded opening 2| to 3 Claims. (o1. 76-46) receive the threaded upper portion of the adjusting bolt 22. The upper portion of the bolt is formed with fine threads which are preferably thirty-two to the inch and each time the bolt is turned the bridge bar will be shifted vertically one thirty-second of an inch for each complete rotation of the bolt. An offset portion 23 projects from the side plate 2 midway its length andin this offset portion is formed a vertically extending groove 24 into which fits a rib 25 projecting from the shank and serving to guide vertical movement of the bridge bar. The bolt rotatably passes through the openings l3 and it of the tongue l2 and flange 3 and about the bolt is mounted a collar 26 which is located between the tongue and the flange and secured by a set screw 21 so that it turns with the bolt. Gauge marks 28 are provided upon the edge faces of the tongue and the flange, and by watching the graduations 26 of the collar pass the marks 28 the number of turns imparted to the bolt when vertically adjusting the bridge bar may be ascertained. The bolt is held against verticalv 25. movement by the collar and the lower portion of r the bolt which is firmly secured after the bridge bar has been moved vertically to an adjusted position.

The bridge bar or block supports a guide plate a 32 disposed at an incline and having depending with a strip 35 connected with the main portion of the plate by a neck or tongue 36. A tongue,

i 3 without striking the cap plates. 35'

tongues or lugs 33 which are secured against the bridge bar by screws 34. The plate extends at a downward incline towards the cap plate 5 and is of such length that it may move vertically The width of the plate is such that its outer side edge is flush with the outer side edges of the cap plates and the outer side portion of the plate is formed with slots leading from its ends and forming the plate 3'! projects from the shank 20 of the bridge bar under the plate 32 and is formed with a threaded opening through which passes a screw 38 having a turning head at its lower end so that it may be grasped and turned to move it upwardly into position to engage the under face of a file and bind the file against lower ends of the abutment tongue I5. A post 39 projects upwardly from the end of plate 32 near the inner end of the cap plate 5 and this post carries a sleeve 40 formed with a vertically extending threaded bore to receive the swaging screw 4| which has its lower end passing through an opening formed in the inner portion of the cap plate 5 and above the sleeve carries a locking nut 42 for engaging the upper end of the sleeve and securing the swaging screw in an adjusted position.

The operation is as follows:

When jointing the cutting teeth of a saw blade, a file is mounted beneath the abutting tongues l and held in position by the screw 38, the file extending in the path of the teeth as shown in dotted lines Fig. 4. The guage is then placed against the saw blade, by permitting the base 3 and tongue 31 to contact the; blade, The teeth; are then peltrmitted to contact the file and bymoving-the gua along the saw blade, the jointing is completed.

After jointing the saw, the cutting teeth are meet:

in the usual manner.

When filing the raker teeth, the file is removed from the guage and the teeth of thetsawiarei placed into the slots 32 of blockjz. screw 29 is then set for the proper depth to ine-. l

b passing through an opening in the front cap filed. After the filing is completed the guage is then moved over and the raker point struck with a hammer inorder, to. swedge the'raker teethltothe 'desirediangle. I

Having, thus described, the invention;v what-is claimed-is; l r I l -1. .Adeviceofthecharacter described comprise ingamainframehaving a vertically diPQSed s1de plate anda flange projecting lattarallyaldngits lower edge, Vfront. and rear cap' plates projecting laterally from the. upper ed filflf' hegsidapl e f said' frarneqoverthe side flange and havin them inner ends spaced fromi each other, the sideplahe, being formed with a, repress: in; its. upper pmittiojnx between the, eanplatesan with. an opening insists. lower, po tion.- under the., :e, ess,, there b ina Vet-- tiealtrackin the side plate betweenthereeese lnd. the 'Q en n ia r movablebridge T ar extend n between said cap plates and shiit'able vertically'in. the track andhavingits endsextending underthej cap plates a d. pr v ded gwithl upst nding, pins lid'ably passing throu h; penings inv thencap, p1ates, agu de plate iQr arfile extending, at alone itudinei,in 1 ne, b twe n the capplatesand; see

7 uredto the. bridge plate, lugs extending down wardly r m said cap pla es. adjacent endsoi said bridge bars and eonstitutinglsea sfor afilelas de and having inner ends spaced from each other, abutments extending downwardly from the cap plates and spaced from inner ends thereof, a bridging bar extending between said cap plates and under inner ends thereof, a bolt rotatably mounted vertically through the side flange of said frame and having its upper portion threaded through the bridging bar for supporting the bar against under faces of the cap plates, a. side arm {cream-bridging; bar, a'set fscrew threaded vertically'through the sidearm for engaging a file and clamping the file against said abutments, a

. guide plate extending longitudinally at an incline ,between the cap plates and secured to the bridging bar, a sleeve over the inner end portion of, the v.131C285; wtptplate, and a swaging screw threaded vertigallg thrqughsaid sleeve with its lower portion 3. A device of the character described comprisingairamamfmnt andrearcap Plates-projecting laterally 10f thelframel. abrid betwee theic plaii'flsq termed, with; a; verti a ly, extending orer upner. and-lower sideexte o s; v the ir nie,

having, openings.- aligned with v the; bo1fe,; an v adlusting screw extending vertically. and'rotatably, mn ntedl hn ug the, openings-and. ha ng its p er po t onthreaded through the bore, a collar ahoiit; said; bolt rem vab ysecured: thereon bea tween the side extensions-withitsendsengaging tneside extensions a d preve t n er cal-mov rit 'Qf.- he b lt. the bolt, when, turned shifting t e brid e o. verti ally. a inst d os ions, a net 7 threaded upon thebolt under thelowerside ex,,

front end thereof; and meansformounting a file a m-t r saii r d e ba a s tscrew threadedenticallythrough the side arm for bindingja'ijle aee n tf a d lu s adjust ng b.0111 passin verticallythrought el w r ng of hes de plate endhey neit upper po t on t readed nd passin t rq ehe. t a ed opening. or e ver iea l t rq h t e. br de ner for. supporti g he bri e h an 've ticali adiust gthe bar when, th holt p fne an na l t adedv e ve cov r the. inner en lnq tiqn o one enp e erenda Wag n nre t t e e e t a y hr ugh sai 's ev and h pens e p rt pn a s hreu hi i e plate, f i l 1 r V n'gevice of the, character described compris, s: am i mme e'r n as eflehele el nei we, e a nae. e;x nen ;em irentamt ea reri ns t e vene r v s ee z f he m nirems tween the can p ateaa s ase ar ied b saideuide late an x e n r ically in .advancelotthe one udin ro th ram unde the u p a and the capplates,

7 Q JAY c. REFERENCES QIfIfEDQ.

The following reierences are -of recordinl the file o f,this "112 1 6 1 UNf i H T A 1 l g um e Name D 663,322 Anderson j-..-v--. Dec. 4,; 190d 1 A der n 1- pr. '2 19 7%; 7 Anderson S 1 ,19 3 7535 lloway-p -.Mar..1, 7 818,195; Roach Apr. 17,1905 887,694 Roach May 12,1908 7 1 9 7,179. Devini ,Dec.' 17., .19l2: 5 466 Ho n ----H- May '20, 1 1.3 1,192,925 Mohney Aug. 1', 191.6

15229 5 Mar..,. 9 ezz 9i9n pr en in thellnde eszefthese law 1: si e ex ensienand. ecuri heg oltinl an" 

